Net Assets in Liquidation - Reconciliation of Shareholder's Equity under Going Concern Basis of Accounting to Net Assets in Liquidation under Liquidation Basis of Accounting (Detail) - USD ($)		5 Months Ended	12 Months Ended
	Aug. 01, 2014	Dec. 31, 2014	Dec. 31, 2015	Jul. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Liquidation Basis Of Accounting [Line Items]
Shareholder's Equity as of July 31, 2014	$ 476,454,000			$ (514,214,000)	$ (509,663,000)	$ (469,264,000)
Increase due to estimated net realizable value of investments		$ 192,211,000	$ 78,308,000
Secured financing	(1,699,000)
Loan securities	692,000		918,000
Deconsolidation of properties	10,178,000
Decrease due to write-off of assets and liabilities	(44,691,000)
Increase in non-controlling interest	(35,675,000)
Net assets in liquidation	786,915,000	$ 594,704,000	$ 516,396,000	$ 786,915,000
Real Estate Investment [Member]
Liquidation Basis Of Accounting [Line Items]
Increase due to estimated net realizable value of investments	220,338,000
Equity Investments [Member]
Liquidation Basis Of Accounting [Line Items]
Increase due to estimated net realizable value of investments	182,472,000
Loans Receivable [Member]
Liquidation Basis Of Accounting [Line Items]
Increase due to estimated net realizable value of investments	6,071,000
Liability [Member]
Liquidation Basis Of Accounting [Line Items]
Liability for estimated costs in excess of estimated receipts during liquidation	(27,225,000)
Accounting Standards Update 2013-07 [Member]
Liquidation Basis Of Accounting [Line Items]
Adjustment to reflect the change to the liquidation basis of accounting	$ 310,461,000